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Print in friendly format Send this term to a friend  4L80E
Automatic Transmission - 4 Speed

1st Gear: 2.43
2nd Gear: 1.49
3rd Gear: 1.00
4th Gear: 0.75

Reverse: 2.07

- Used in production GM models...
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TH2004R Shifting Improvement suggestions.

Subject: TH2004R Shifting Improvement suggestions.
by Durango_Boy on 2011/5/10 13:18:09

PeteK you still perusing the forums for transmission questions? LOL.

I put a TH2004R in my 1977 Corvette behind my roller 405 SBC. I installed a B&M lockup controller and the Grand National lockup converter that came with the transmission.

I'm not happy with the shifting points...like it never knows what gear to be in.

I need suggestions for what I assume I need, a shift help kit and possibly a higher stall converter. It seems like it's shifting too early, and I want to elongate the RPM band per shift without keeping the accelerator floored.

Thanks.
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